Where the zonal and socio-economic data provide information on the demand for travel, the roadway network provides information on the supply. Like the zone system, the modeled network is a simplification of the real world. For this reason, signal locations, intersection geometries, shoulder widths, and even neighborhood streets are not included.
VDOT and the MPO delivered the initial network, which was developed for the previous model, to the Systems Analysis Group.
The map below shows the speed limits and lanes on this network, with the TAZ boundaries available as well.
Systems Analysis Group, WSP | Parsons Brinckerhoff 2016